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W. B. HALE & R. E. DURINGER.

SPARK ARRESTER FOR SMOKE PIPES.

No. 448,918. Patented Mar. 24, 1891.

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NITED STATE-S ies.

PATENT WVILLIAM B. HALE AND ROBERT E. DURINGER, OF FORT WORTH, TEXAS; SAID HALE ASSIGNOR TO BENJAMIN C. EVANS, OF SAME PLACE.

SPARK-ARRESTER FOR SMOKE-PIPES.

SPECIFICATION forming part of Letters Patent No. 448,918, dated March 24, 1891.

Application filed November 24,1890. Serial No. 372,4 l8. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM B. HALE and ROBERT E. DURINGER, citizens of the United States, residing at Fort Worth, in the county of Tarrant and State of Texas, have invented certain new and useful Improvements in Spark-Arresters for Smoke-Pipes; and We do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to smoke-stacks for steam-boilers, and is more especially applicable to boilers for thrashing-machines, sawmills, locomotives, or other portable boilers, where for convenience in transportation a short smoke-stack must be used, and where at the same time there is either great danger to the surrounding property from sparks or great annoyance to the passengers from flying cinders.

In the drawings, where the same parts are indicated by the same letters, we show our invention as applied to a boiler similar to those used in either railway-locomotives or in portable thrashing-machines.

Figure 1 represents a side V16W of the said boiler, part of the smoke-pipe being broken away to better illustrate our invention. Fig. 2 represents an end view of the boiler, with our attachments as seen from the end opposite the furnace.

A represents the boiler. The furnace, flues, &c., not being peculiar to our invention, are not shown.

B represents the smokestack, having one complete turn, as shown in both figures.

0 represents a coarse wire screen secured in the lower portion of the curve of the smokepipe, and tilted, as shown. The upper end of 0 should preferably overhang the lowest part of the curve in the smoke-stack, and at this lowest part we place a cinder-pipe Said pipe has preferably a conloal bouohing d for the better entrance of the cinders, and to prevent choking of the said pipe we have a steamjet E, controlled by the .valve e. Some arrangement may also be made for turnlng this valve from the rear of the boiler. The smokestack itself may also have a steam-j et or other means for forcing the draft; but as this is not a bottom H,hinged at one side h, and held up at the other h by the chain K, which passes over a roller 7c, attached to any convenient part of the boiler, lagging, or frame-work, the

said chain leading to the rear of the boiler,

where it is secured. it represents any convenient hand attachment for raising and lowering the bottom H. After the products of combustion enter the smoke-stack they are carried through the curved portion, where the solid particles naturally fall to the bottom. The wire screen 0 also serves as a further check to the solid particles, and from its overhanging position the said particles striking it are thrown downward and fall into the pipe D. Should the pipeD become clogged in any way and the cinders gather in the bottom of the curve of the smoke-stack, the steam-jet E is turned on. Before doing this it would be advisable to lower H by slacking off the chain K; but no accident would occur should this be omitted, as H cannot be made to fit Very closely, and moreover would yield sufficiently to allow the steam to escape above its edges. WVhenever it is desired to empty the pan G, the chain K may be slacked off and the bottom H allowed to drop enough to allow the cinders to fall out. By this means not only are sparks arrested, but the cinders from the smoke-pipe are gathered into a receptacle from whichthey may be easily taken for the various uses to which they are put.

Having now described our invention, what we claim, and desire to secure by Letters Patent, is-

1. In attachments for steam-boilers, the combination ofa bent smoke-pipe having one complete turn downward, a cinder-pipe opening into the lowest portion of said turn, and a steam-jet actuated by hand for blowing down said cinder-pipe, substantially as described.

2. In attachments for steam-boilers, the combination of a bent smoke-pipe having one complete turn downward, a cinder-pipe opening into the lowest portion of said turn, and

a steam-jet actuated by hand for blowing down said cinder-pipe, a receptacle beneath said cinder-pipe for the cinders, said receptacle having a hinged door for dumping the said cinders, substantially as described.

In attachments for steam-boilers, the combination of a bent smoke-pipe having one complete turn downward, a cinder-pipe opening into the lowest portion of said turn, a coarse wire screen tilted backward and overhanging said pipe, and a steam-jet actuated by hand for blowing down said cinder-pipe, a receptacle beneath sald cinder-pipe for the cinders, said receptacle having a slanting bottom hinged at the upper end and secured at the lower end by means of a chain passing over a suitable roller and leading to the rear of the boiler, substantially as described.

In testimony whereof we afiix oursignatures 3o in presence of two witnesses.

W'M. B. HALE. ROBT. E. DURINGER. Witnesses:

W. H. BROWN, JOHN F. ZINN, 

